header{
    width: 100%;
   height: auto;
    background: #343434;
    position: absolute;
    top: 0;
    left:0;
    color:#fff;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
}

header a{
    color: #fff;
}
.search_wrap{
    width: 100%;
    height: 1rem;
    display: flex;
    justify-content: center;
    align-items: flex-end;
}
.search_hidden{
    display: none;
}
.search{
     width: 7rem;
     height: .8rem;
     border-radius: .4rem;
    background: #505050;
    display: flex;
    align-items: center;
    padding-left: .6rem;
}
.search input{
    outline: none;
    border: none;
    height: .6rem;
    border-radius: .3rem;
    background: #505050;
    width: 5rem;
    color: #fff;
    font-size: .36rem;
}
.head_nav{
    width: 100%;
    height: 1rem;
    display: flex;
    justify-content: space-around;
    align-items: center;
}
.selected{
    color:yellowgreen;
}